Question

Which of these surface features, discovered by the first spacecraft mission (Mariner 4) to Mars, was NOT expected to be seen on Mars?

A.craters
B.giant volcanoes
C.expansive canyons
D.canals
E.running water

Answer 1

The surface feature that was NOT expected to be seen on Mars by the Mariner 4 spacecraft mission is running water.

Step-by-step explanation:

The surface feature that was NOT expected to be seen on Mars by the Mariner 4 spacecraft mission is E. running water.

The Mariner 4 mission, which flew by Mars in 1965, primarily aimed to study the planet's surface and atmosphere. At that time, scientists did not expect to find evidence of running water on Mars. However, subsequent missions and observations have revealed the presence of ancient riverbeds and gullies, suggesting that liquid water may have existed on Mars in the past.